Original Part
Transceiver, Non-Inverting 2 Element 8 Bit per Element 3-State Output 48-TSSOP
Alternative Part
Transceiver, Non-Inverting 2 Element 8 Bit per Element 3-State Output 48-TSSOP
Transceiver, Non-Inverting 2 Element 8 Bit per Element 3-State Output 48-SSOP
1. 74FCT162245ATPAG Substitution Conclusion
The 74FCT162245ATPAG can serve as a substitute for the original part in applications with low drive current requirements, but with a critical caveat regarding performance degradation. The key difference lies in the output drive capability: the original part (TI) is rated for 32mA (source) / 64mA (sink), whereas the ATPAG (Renesas) offers a symmetrical 24mA / 24mA. The substitute's drive strength, particularly its low-level output sink current, is significantly reduced (from 64mA to 24mA). When driving heavy loads, such as multiple bus lines or several load devices, this can lead to degraded signal rise/fall times and reduced high/low-level voltage margins. Under worst-case conditions, it may introduce timing or logic errors. Prior to substitution, it is essential to verify that the actual load current in the original design is below 24mA. Otherwise, a full signal integrity reassessment is required.
2. 74FCT162245ATPVG Substitution Conclusion
The 74FCT162245ATPVG cannot be used as a direct drop-in replacement for the original part. Although its logic function, voltage levels, and drive current (24mA/24mA) are identical to the ATPAG variant from the same manufacturer, the fundamental incompatibility lies in the physical package dimensions. The original part uses a 48-pin TFSOP package (width: 6.10mm), while the ATPVG comes in a 48-pin BSSOP package (width: 7.50mm). Their pin pitch and package outlines are completely different, preventing installation onto PCB pads designed for the TFSOP footprint. Regardless of electrical performance, this package mismatch alone disqualifies the ATPVG for direct replacement of the original part, unless a board redesign is undertaken.
Analysis ID: 0A5E-7B2C000
Based on part parameters and for reference only. Not to be used for procurement or production.
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